ZOOLOGY. — TERX. 533 



upright, like the penguin. It cannot rise on the 

 wing in any direction excepting to windward. If 

 it attempts to fly to leeward, it runs for a consider- 

 able distance along the surface of the water, and at 

 length falls into it. It swims and dives well. It 

 also evades the shot when fired at ; but not so cer- 

 tainly as the doveca. Its feet compensate for the 

 shortness of its tail in flying, and are used as a 

 helm. 



3. CoLYMBUS glacialis. — Great northern Diver. 

 Seen by Captain Phipps on the Coast of Spitzber- 

 gen. 



Sterna Jiirundo. — Great Terri, or Sea Swal- 

 low. — This elegant bird is common on the shores of 

 Spitzbergen, but is not met with at a distance from 

 land. The length of its body is 7 or 8 inches, but 

 including the tail, 14. Spread of the wings 29 or 

 30 inches. It flies with great ease and swiftness, 

 and ascends to a considerable height in the air. It 

 defends its eggs and young with great boldness from 

 the depredations of the arctic gull ; and even de- 

 scends within a yard of the head of any person who 

 ventures to molest them, and startles him with its 

 loud screams. It lays its eggs among the shingle 

 of the beach, above high water-mark, where the full 

 power of the sun falls. 



